Abstract
Heterodera litoralis sp.n. (Ncmatoda: Heteroderidae) is described from austral glasswort, Sarcocornia quinqueflora (Ung.-Sternb.) A.J. Scott (Chenopodiaceae), a coastal succulent common in Australia, New Caledonia and New Zealand. The new species resembles Heterodera turcomanica in the orientation of the subterminal fcnestrae on the vulval cone. H. turcomanica is a species in the H. avenae group. The long vulval slit of about 40 μm excludes the new species from the H. avenae group. Among the Heterodera species with a long vulval slit H. litoralis most closely resembles H. humuli (cysts bifenestrate, vulval bridge wide, vulval slit long, underbridge present, bullae lacking). H. litoralis differs from H. humuli by the longer, more slender cysts and the longer stylet of the second-stage juveniles.
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